[A-CG31] Aircraft and UAV Observations for Earth-planetary sciences

[ACG31-P04] Simulation of airborne dual-polarization phased array radar observation of a typhoon

*Nobuhiro Takahashi¹ (1.Institute for Space-Earth Environmental Research, Nagoya University)

Keywords:airborne radar, phased array

In this study, dual-polarization phased array radar observation is simulated by considering the electrical scan of the radar and flight path as well as the polarimetric observables aiming for the typhoon observation which has horizontal dimension of > 300 km and vertical extent of >10 km. Assuming that the aircraft flies about 13 km in height where are the cloud-free height except for the eye-wall region and aircraft flies circular path centered the eye of typhoon or straight path cross the eye region, the radar specifications are set as follows: scan angle is -90 degree to + 10 degrees, 1 degree intervals, scan direction is cross-track direction of the aircraft, and the observables are Zh, ZDR, φDP, ρHV and Doppler velocity. First of all, simple typhoon model is simulated by the radar, especially for Zh and Doppler velocity in order to check the geolocation of the aircraft and beam locations. The polarimetric simulation is based on the scattering characteristics of non-spherical particles of rain and ice by using T-matrix method. For the ice precipitation, several types of particles with different shape (oblate/prolate) and different refractive indices (various air and ice mixture).